Warming device using electromagnetic induction method

Abstract

The present invention relates to a warming device using an electromagnetic induction method, comprising, a main body, in the form of a support, which includes an electromagnetic induction coil for generating a magnetic field when applying an alternating current power to an upper surface thereof, and a container having a bottom surface which is formed to be seated on the upper surface of the main body, wherein the bottom surface comprises a metal body which is induction-heated by electromagnetic interaction with the generated magnetic field when the bottom surface is seated on the upper surface of the main body. The present invention provides a warming device using an electromagnetic induction method, which maintains a constant temperature of the container, thereby always enabling a user to drink coffee or tea at a desired temperature.

What is claimed is: 
     
         1 . A warming device using an electromagnetic induction scheme, the warming device comprising: a main body, in the form of a prop, including, in a top thereof, an electromagnetic induction coil generating a magnetic field when applied with alternating current (AC) power; and
 a container having a bottom formed to be seated on the top of the main body and including, in the bottom of the container, a metal body inductively heated by electromagnetic interoperation by a magnetic field produced when the bottom of the container is placed on the top of the main body.   
     
     
         2 . The warming device of  claim 1 , wherein an inside surface of the container is formed of a thermal-conductive metal or a thermal-conductive resin. 
     
     
         3 . The warming device of  claim 1 , wherein an outside surface of the container is formed of a heat-insulative resin. 
     
     
         4 . The warming device of  claim 1 , wherein the main body enables a degree of the metal body heating by including a resonance circuit controller including a resonance capacitor connected with the electromagnetic induction coil and adjusting overall impedance by the resonance capacitor to adjust the magnitude of a magnetic field produced from the electromagnetic induction coil and a temperature controller controlling an operation of the resonance circuit controller so that the magnitude of the magnetic field produced from the electromagnetic induction coil by the resonance circuit controller is adjusted to a magnitude corresponding to the temperature of the metal body heated. 
     
     
         5 . The warming device of  claim 1 , wherein the main body includes a detection sensor detecting whether the container is placed on the top of the main body, and the main body further includes a power switching unit allowing the AC power to be applied to the electromagnetic induction coil only when the detection sensor detects that the container is placed on the top of the main body. 
     
     
         6 . The warming device of  claim 1 , wherein a temperature sensor is further provided inside the container, and wherein a temperature of the inside of the container measured by the temperature sensor is output through a display provided on a side of the main body or an outer surface of the container. 
     
     
         7 . The warming device of  claim 1 , wherein the container includes a cover opening or closing the top opened and a temperature sensor detecting a temperature of a content contained therein, wherein the cover includes an opening configured to circulate air between an inside and outside of the container and a door slid by a micromotor to open or close the opening, and wherein the container further include a controller controlling an operation of the micromotor so that the door opens the opening if a temperature detected by the temperature sensor is a preset temperature or more. 
     
     
         8 . The warming device of  claim 1 , wherein a receiving part depressed from an upper side to a lower side thereof is formed in the top of the main body, wherein the electromagnetic induction coil is included inside a bottom of the receiving part, and wherein the container is formed in a corresponding shape to be received in the receiving part.